Section Il. EQUIPMENT DESCRIPTION AND DATA

TM11-7021-202-12

Section Il. EQUIPMENT DESCRIPTION AND DATA

1-8.

EQUIPMENT DESCRIPTION

The processor is one in a family of military computers supporting scientific and real-time

applications requiring high speed processing and throughput. The processor provides proven

reliability and high resistance to severe operating environments.

The processor is packaged in a single, conductively cooled air-transport rack (ATR)

chassis/mainframe with wraparound heat exchanging. The chassis/mainframe provides an

exit path for heat being generated by the power supply and printed-circuit boards (PCB).

Cool air sucked in at the front of the processor is drawn through the air ducts on each side

of the chassis absorbing heat as the air flows over the heat-conducting surfaces. The heated

air is exhausted at the rear of the unit. Access for servicing the processor is facilitated by

the removal of the power supply, front panel, and top and bottom cover plates.

Depending upon processor configuration (table 1-1), there may be either core or memory,

configured with one of two types of Central Processing Unit (CPU) PROM printed-circuit

boards (PCB), one of two types of Floating Point Unit (FPU) "C" PCB; and one of two types

of motherboard processor may be powered by an ac or dc power supply. Additionally, a

wide selection of input/output (1/0) interface PCB may be employed.

Eight input/output (I/0) slots are provided in the processors card cage for a maximum

configuration of eight I/0 interfaces. The I/0 interfaces contain the interface logic and

circuits that effect the two-way transfer of information and data between the processors CPU

section and peripheral devices. It includes direct-memory access for high-speed devices.

A built-in test feature (BITE) provides a series of self-test diagnostics that are automatically

performed at power-up as an aid in assuring processor readiness and the isolation of fault

conditions.

A battery back-up feature for semiconductor memory configurations can be implemented to

retain memory integrity in the event of power interruption.

Operator control of the CPU is provided through a system terminal when the CPU is in the

virtual console (VC) mode. This mode permits boot/load operations, program loading, and

diagnostic program loading. In addition, it provides the operator with the means of inserting

break-points, examining and/or modifying the contents of a memory location or an internal

software register, injecting standard program control functions, and the running of

diagnostics.

1-9.

EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES

Table 1-2 provides a list of the processor's characteristics, capabilities, and features.

1-3